.iframe-container {
    overflow: hidden;
    padding-top: 56.25%;
    position: relative;
    min-height: 400px; /* allow for some optional items e.g Apple Pay*/
}

    .iframe-container iframe {
        border: 0;
        height: 100%;
        left: 0;
        position: absolute;
        top: 0;
        width: 100%;
    }

/* 4x3 Aspect Ratio */
.iframe-container-4x3 {
    padding-top: 75%;
}
.sq-field {
    margin-bottom: 16px;
    width: 95% !important; /*less than 100 renders better*/
}
.sq-payment-form-custom {
    max-width: 94% !important; /*less than 100 renders better*/
    padding: 20px 20px 5px;
    width: 380px;
}